Silvertop burning oil - compression results

[Jezza_hr]

I'll be interested to see what the experts make of this. My newly installed silvertop 20V (head was rebuilt 2000 miles ago by previous owner also head and block were skimmed with new TRD 0.8mm head gasket) is burning oil after 4k rpm. The initial thought was that it would be the valve seals, but after some engine stop leak and copius amount of burning later (from top of dipstick to bottom in one night after an hour or so motorway driving) it's got me thinking there could be more to it.

So, I did a compression test this evening and these are the results

Dry PSI
193 cyl1
200 cyl2
195 cyl3
190 cyl4

Wet PSI
220 cyl1
250 cyl2
230 cyl3
220 cyl4

Now, the fact the pressure has gone up, would suggest my piston rings are at fault. Yet, the rings are all within tolerance and way above the minimum amount for a 20V, so i'm a bit baffled as to how this could come to be.

After running the engine over for a while, we removed the dipstick and sure enough the dipstick was producing smoke. So, yet again it points to piston rings, but im still amazed that the compression could be so high. Is there anything I could be missing here?

[Ivan141]

Maybe some of the rings are not put in correctly? Just an idea, since it sure sounds like the oil is getting past the rings. Might be a problem with the oil scraper rings.

[jondee86]

Have a read of the article inside this thread...

http://www.zcar.com/forums/read/1/692849

Cheers... jondee86